PAM2842RGR LED Driver IC Equivalent & Substitute Parts

Part Overview

The PAM2842RGR is a LED Driver IC manufactured by Diodes Incorporated, designed for backlight applications with integrated DC-DC regulator functionality. This device features a 1-output configuration with support for multiple topologies including SEPIC, Step-Down (Buck), and Step-Up (Boost) conversion modes. The PAM2842RGR operates across a wide supply voltage range of 5.5V to 40V and delivers 4.6A switch current with both analog and PWM dimming capabilities.

The PAM2842RGR is classified as Obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Identifying compatible alternatives ensures design continuity and supply chain flexibility while maintaining functional and electrical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	PAM2842RGR
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	SEPIC, Step-Down (Buck), Step-Up (Boost)
Number of Outputs	1
Voltage - Supply (Min)	5.5V
Voltage - Supply (Max)	40V
Current - Output / Channel	4.6A (Switch)
Dimming	Analog, PWM
Applications	Backlight
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	20-TSSOP (0.173", 4.40mm Width) Exposed Pad
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PAM2842RGR is determined by the following critical parameters:

Primary Substitution Criteria:

Topology compatibility (SEPIC, Step-Down, Step-Up, or Flyback support)
Supply voltage range (minimum 5.5V to maximum 40V, or overlapping range)
Switch current rating (4.6A or higher)
Dimming capability (Analog and/or PWM support)
Single output configuration
Surface mount packaging with exposed pad
Operating temperature range (-40°C to 85°C or extended)

Substitute Parts Identified:

The following parts meet substitution criteria based on topology overlap, voltage range compatibility, and current handling capability:

LT3477EUF#PBF - Flyback, SEPIC, Step-Down, Step-Up topology; 3A switch current; 2.5V-25V supply range; PWM dimming; Active status
LT3519IMS-2#TRPBF - SEPIC, Step-Down, Step-Up topology; 750mA switch current; 3V-30V supply range; Analog/PWM dimming; Active status
LT3519IMS-2#PBF - SEPIC, Step-Down, Step-Up topology; 750mA switch current; 3V-30V supply range; Analog/PWM dimming; Active status
MIC2293-15YML-TR - Step-Up (Boost) topology; 750mA switch current; 2.5V-10V supply range; Analog/PWM dimming; Active status
RT8453BGSP - Step-Down (Buck) topology; 1.5A switch current; 4.5V-40V supply range; Analog/PWM dimming; Active status
MAX1910EUB+T - Switched Capacitor topology; 120mA current; 2.7V-5.3V supply range; Limited current capability
LTC3201EMS#PBF - Switched Capacitor topology; 100mA current; 2.7V-4.5V supply range; Limited current capability
BD60A00NUX-TR - Step-Up (Boost) topology; 30mA current; 2.7V-5.5V supply range; Limited current capability
MIC3287YD5-TR - Step-Up (Boost) topology; 350mA switch current; 2.8V-6.5V supply range; Analog/PWM dimming; Active status

Parameter Comparison

Part Number	Manufacturer	Topology	Supply Voltage (Min-Max)	Switch Current	Dimming	Operating Temp	Package	Product Status
PAM2842RGR	Diodes Inc.	SEPIC, Buck, Boost	5.5V - 40V	4.6A	Analog, PWM	-40°C ~ 85°C	20-TSSOP-EP	Obsolete
LT3477EUF#PBF	Analog Devices	Flyback, SEPIC, Buck, Boost	2.5V - 25V	3A	PWM	-40°C ~ 85°C	20-QFN (4x4)	Active
LT3519IMS-2#TRPBF	Analog Devices	SEPIC, Buck, Boost	3V - 30V	750mA	Analog, PWM	-40°C ~ 125°C	16-MSOP	Active
LT3519IMS-2#PBF	Analog Devices	SEPIC, Buck, Boost	3V - 30V	750mA	Analog, PWM	-40°C ~ 125°C	16-MSOP	Active
MIC2293-15YML-TR	Microchip	Step-Up (Boost)	2.5V - 10V	750mA	Analog, PWM	-40°C ~ 125°C	8-MLF (2x2)	Active
RT8453BGSP	Richtek	Step-Down (Buck)	4.5V - 40V	1.5A	Analog, PWM	-40°C ~ 125°C	8-SOP-EP	Active
MAX1910EUB+T	Analog Devices/Maxim	Switched Capacitor	2.7V - 5.3V	120mA	-	-40°C ~ 85°C	10-uMAX/uSOP	Active
LTC3201EMS#PBF	Analog Devices	Switched Capacitor	2.7V - 4.5V	100mA	-	-40°C ~ 85°C	10-MSOP	Active
BD60A00NUX-TR	Rohm Semiconductor	Step-Up (Boost)	2.7V - 5.5V	30mA	PWM	-40°C ~ 85°C	8-UFDFN-EP	Not For New Designs
MIC3287YD5-TR	Microchip	Step-Up (Boost)	2.8V - 6.5V	350mA	Analog, PWM	-40°C ~ 125°C	SOT-23-5	Active

Engineering Selection Recommendations

Primary Recommendation for Full Functional Replacement:

LT3477EUF#PBF is the most suitable direct replacement for the PAM2842RGR. This part maintains topology compatibility (Flyback, SEPIC, Step-Down, Step-Up), delivers comparable switch current (3A vs. 4.6A), and operates within overlapping temperature ranges. The LT3477EUF#PBF is in Active product status, ensuring long-term availability and supply chain stability. Both devices are ROHS3 compliant with MSL-1 moisture sensitivity ratings.

Secondary Recommendations Based on Application Requirements:

For SEPIC/Multi-Topology Applications with Extended Temperature Range: LT3519IMS-2#TRPBF or LT3519IMS-2#PBF provide SEPIC, Step-Down, and Step-Up topology support with extended operating temperature (-40°C to 125°C). These parts are Active status but deliver reduced switch current (750mA), suitable for lower-power backlight applications.
For Step-Down (Buck) Topology with Wide Supply Range: RT8453BGSP maintains the 4.5V-40V supply voltage range and supports both Analog and PWM dimming. This part is Active status with 1.5A switch current, appropriate for applications requiring buck conversion within the original supply range.
For Boost-Only Applications: MIC2293-15YML-TR or MIC3287YD5-TR provide Step-Up (Boost) topology with Active status. MIC2293-15YML-TR delivers 750mA switch current, while MIC3287YD5-TR provides 350mA with extended temperature range support.

Not Recommended for New Designs:

BD60A00NUX-TR is classified as "Not For New Designs" and delivers only 30mA current, making it unsuitable for applications requiring the PAM2842RGR's 4.6A capability.

Limited Current Capability:

MAX1910EUB+T and LTC3201EMS#PBF employ Switched Capacitor (Charge Pump) topology with significantly reduced current ratings (120mA and 100mA respectively). These parts are suitable only for low-power backlight applications and do not provide equivalent performance for the PAM2842RGR's 4.6A specification.

Frequently Asked Questions (FAQ)

Q: Can LT3477EUF#PBF directly replace PAM2842RGR in existing designs?

A: LT3477EUF#PBF provides functional equivalence for topology and dimming capability. However, the supply voltage range differs (2.5V-25V vs. 5.5V-40V). Designs operating within the 5.5V-25V overlap range can use this substitute. Package differences (20-QFN vs. 20-TSSOP) require PCB layout modifications. Verify application-specific requirements before implementation.

Q: What is the primary limitation of LT3519IMS-2#TRPBF as a substitute?

A: The LT3519IMS-2#TRPBF delivers 750mA switch current compared to PAM2842RGR's 4.6A. This part is suitable for applications requiring lower output current. The 16-MSOP package differs from the original 20-TSSOP, requiring PCB redesign. Supply voltage range (3V-30V) overlaps with the original specification.

Q: Why are Switched Capacitor topology parts (MAX1910EUB+T, LTC3201EMS#PBF) not recommended?

A: These parts employ fundamentally different conversion topology (Switched Capacitor vs. inductive) and deliver significantly lower current ratings (100-120mA vs. 4.6A). They are suitable only for low-power backlight applications and do not provide equivalent performance for the PAM2842RGR's specifications.

Q: Is RT8453BGSP suitable for applications requiring SEPIC or Boost topology?

A: RT8453BGSP supports only Step-Down (Buck) topology. Applications requiring SEPIC or Step-Up (Boost) conversion must use alternative substitutes such as LT3477EUF#PBF or LT3519IMS-2#TRPBF.

Q: What packaging considerations apply when substituting these parts?

A: The PAM2842RGR uses 20-TSSOP-EP packaging. Substitute parts employ different packages: LT3477EUF#PBF (20-QFN), LT3519IMS-2#TRPBF (16-MSOP), RT8453BGSP (8-SOP-EP), MIC2293-15YML-TR (8-MLF), and MIC3287YD5-TR (SOT-23-5). Package differences require PCB layout modifications and may affect thermal management characteristics.

Q: Are all substitute parts ROHS3 compliant?

A: All identified substitute parts are ROHS3 compliant. Moisture Sensitivity Level (MSL) ratings vary: most parts are MSL-1 (Unlimited), while RT8453BGSP is MSL-3 (168 Hours). Verify MSL requirements for your manufacturing and storage conditions.

Q: Which substitute provides the best long-term availability?

A: LT3477EUF#PBF, LT3519IMS-2#TRPBF, MIC2293-15YML-TR, RT8453BGSP, and MIC3287YD5-TR are all classified as Active status, ensuring ongoing production and supply chain support. BD60A00NUX-TR is classified as "Not For New Designs" and should be avoided for new applications.

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